Recyclable covered stent

Abstract

The invention relates to the technical field of intravascular stents, in particular to a recyclable covered stent. The stent comprises a stent body, a covered membrane and a traction mechanism. The stent body is made of latticed shape memory alloy and can expand or contract in the radial direction of the stent body. The covered membrane is attached to the inner surface of the stent body, and whenthe stent body is opened, a blood channel is formed in the covered membrane. The traction mechanism comprises a traction tube and a traction wire; the traction tube is located on one side of the nearend of the stent body, and the stent body can slide into the traction tube when the stent body is in a contracted state; and the traction wire is installed in the traction tube in a sliding mode, andone end of the traction wire extends out of the traction tube and is fixedly connected with the near end of the stent body. The covered stent aims to solve the problems that after an existing coveredstent is implanted into a blood vessel of a patient, the covered stent needs to be taken out through an operation again, so that the patient is prone to secondary injury, wounds are increased, and theinfection probability is increased.

Description

technical field [0001] The invention relates to the technical field of vascular stents, in particular to a recoverable covered stent. Background technique [0002] For existing vascular injuries, the traditional treatment method is to use compression to stop bleeding. However, for internal vascular injury and bleeding in the chest cavity, abdominal cavity, or pelvic cavity, surgery is required to use a covered stent for endovascular repair to stop bleeding. [0003] Covered stent refers to a stent coated with a special membrane material on a metal stent, in which the cover film acts as an artificial blood vessel to guide blood flow to each vascular branch, while the stent acts as a radial support and anchors the cover. The role of the membrane. But the existing coated stent is provided with a hook body, and after being inserted into the human body lumen, the hook body penetrates into the wall of the human body lumen to position the bracket. [0004] However, the hook body...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention proposes a recyclable covered stent to solve the problem that after the existing covered stent is implanted into the patient's blood vessel, it needs to be removed by surgery again, which makes the patient vulnerable to secondary injury and increases the trauma. Large, problem with increased chance of infection

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